4. Stoichiometry

Limiting Reactant — Quiz

Test your understanding of limiting reactant with 5 practice questions.

Practice Questions

Question 1

In the reaction 2Na + S → Na₂S, if you start with 46.0 grams of sodium (Na) and 32.0 grams of sulfur (S), what is the limiting reactant? (Molar masses: Na = 22.99 g/mol, S = 32.06 g/mol)

Question 2

In the reaction 2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O, if you start with 58.0 grams of butane (C₄H₁₀) and 160.0 grams of oxygen (O₂), what is the theoretical yield of carbon dioxide (CO₂)? (Molar masses: C₄H₁₀ = 58.12 g/mol, O₂ = 32.00 g/mol, CO₂ = 44.01 g/mol)

Question 3

If 10.0 grams of iron (Fe) react with 10.0 grams of sulfur (S) to form iron(II) sulfide (FeS), what is the limiting reactant? (Reaction: Fe + S → FeS; Molar masses: Fe = 55.85 g/mol, S = 32.06 g/mol)

Question 4

In the reaction 2H₂ + CO → CH₃OH, if you start with 5.0 moles of hydrogen gas (H₂) and 2.0 moles of carbon monoxide (CO), what is the limiting reactant?

Question 5

In the reaction 3Mg + N₂ → Mg₃N₂, if you start with 36.5 grams of magnesium (Mg) and 14.0 grams of nitrogen gas (N₂), what is the theoretical yield of magnesium nitride (Mg₃N₂)? (Molar masses: Mg = 24.31 g/mol, N₂ = 28.02 g/mol, Mg₃N₂ = 100.95 g/mol)